The Yōka Empire, led by its supreme commander Ōka Tadaomi, and Valmgraf, a mysterious military nation commanded by Gustav Heidrich.
An alliance is formed between the two countries, bringing their ambition of “world domination” ever closer to becoming reality.
Then, on a day when the Reiō Sakura Festival, held once every ten years in the Yōka Empire, fills the capital with celebration, a mysterious yōkai suddenly appears within the empire…?
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